The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 21, 2000
Filed:
Nov. 10, 1998
Applicant:
Inventors:
Emmanuel Lanza, Waterloo, BE;
Jean Naveau, Nivelles, BE;
Assignee:
Fina Research, S.A., Feluy, BE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ; C08F / ;
U.S. Cl.
CPC ...
525 98 ; 525250 ; 525285 ; 525366 ; 525385 ; 525386 ;
Abstract
The present invention related to a process for the treatment of vinyl aromatic/conjugated diene block copolymers. More particularly, the present invention relates to a process for the treatment of such copolymers obtained starting from a (co)polymerization-initiating stage performed by means of alkaline based catalysts (Me), deactivated in such a way that they show a termination of the alkali metal-alcoholate type (--O--Me), and treated with a cyclic anhydride of polycarboxylic acid, and optically a C.sub.2 -C.sub.4 monocarboxylic acid.